jackaman
A Jackaman is a brainy, tough-as-nails person who won’t stop until they win. They take charge and make you look like a total noob.
My dad is a Jackaman. He finished the whole puzzle in ten minutes.
That girl in my class is a Jackaman. She solved the problem before the teacher even explained it.
My neighbor is a Jackaman. He finished my homework while I was still eating lunch.